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t

V

0

V2

V1

t0

t1

3 4 b a r

1 5 b a r

5 ba r

00 , 0 1

t (s)

1-

2-

3-

Check valves CLASARCharacteristics

Tyco reserves the right to change the contents without notice page 3

Operating principles

Non return valves mounted on large supply networks and in pumping station delivery lines are required to operate frequently. Statistics show that whenserious pressure surge occurs, this is often due to the fact that an incorrect type of valve has been installed. For example, when a pump is switched offin a pumping station, the flow reduces the speed, stops and is subsequently reversed (Figure 4 and 5). The valve then closes under the effect of thediscs weight or a return spring, or by the reversal of the flow.Experience and calculations show that this reversal can occur within an extremely short time (from 1/100 to 1/10 of a second). If the valve does notrespond quickly, closure will occur sharply during reversed flow conditions, with the result that: the disc is slammed against the seating with a creation of a loud shock wave water hammer is created causing pressure surge

Shock waves and pressure surge stress installation which may result in mechanical failure of the valve components and pipeline.

These problems are even more emphasized if an air pressurized, water tank is inserted in the system (Figure 6). In this case, flow reversal in this shortpipe between the tank and the pump occurs very rapidly. The valve must therefore operate even quicker in order to avoid serious damages.

Check valve

Pump

Description of high dynamic response check valve

The features of ideal check valve can be summarized in the graph(Figure 7)t = 0 The pump stopst = t 0 The velocity of the water is V = 0. It is the beginning of the

reverse flow.Usual values: 1/100 s < t

0< 1/10 s

T = t1 The obturator of the check valve is positioned on the seat:- The reverse velocity of the water is V 1- The reverse flow is stopped immediately- The overpressure is proportional to the reverse velocity

(V1)The ideal check valve should close at t = t 0

CLASAR fulfils this requirement as this check valve has:- Short face to face, thus reducing the stroke of the axial

disc- No axial shaft that may increase the closing time (risk of

jamming)- Density of the axial disc material = 1 (no inertia of the axial

disc in water, low weight of the axial disc)- Spring enhancing the closing time- No creation of shock at closing time due to metal/plastic

contact

R e v e r s e

f l o w

F l o w

Velocity (m/s) of thewater column

Pressure surge zone

Time (second)

Deceleration

Maximum reverse velocity

Pressure surge comparison with different check valves

Figure 8 shows the water hammer resulting from closure of various type of valves underidentical operating conditions:1. Single flap valve2. Dual plate check valve3. CLASAR

Figure 4 Figure 5 Figure 6

Figure 7: Fluid velocity towards time

Figure 8:Pressure surge comparison

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0,01

0,1

1

10

1 10 100 1000 10000

D N 8 0

D N 1 0 0

D N 1 2 5

D N 1 5 0

D N 2 0 0

D N 2 5 0

D N 3 0 0

D N 4 0 0

D N 4 5 0

D N 5 0 0

D N 6 0 0

D N 7 0 0

D N 8 0 0

D N 9 0 0

D N 1 0 0

0

D N 1 2 0

0

D N 1 4 0

0

D N 1 6 0

0

D N 1 8 0

0

80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 1000 1200 1400 1600 1800

3" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" 24" 28" 32" 36" 40" 48" 56" 64" 72"

171 266 417 602 762 1186 1704 2312 3067 4003 4830 6937 13091 12170 21378 19319 38451 52549 68635 86861

Check valves CLASARCharacteristics

Flow coefficients (K v, Cv)

Kv is the flow in m3 /h of water, at an average temperature of 20C, crossing the valve creating a headloss of 1 bar.

DN (mm)

Size (inch)

Kv(Cv = 1.16 Kv)

Headloss ( p)

Simplified formula: Definitions:p = headloss (bar) = density (for water, = 1)Q = flow (m 3/h)Kv = flow coefficient (m

3/h)10 mWC = 1 bar = 100 kPa = 14.5 psi

p

( m W C )

Flow: Q (l/s)

Selection table for materials

Medium Bodies Axial disc Spring

D u c

t i l e

i r o n +

E p o x y

S t a i n l e s s s t e e

l

A l u m

i n i u m

b r o n z e

D u c

t i l e

N i R e s

i s t a l l o y

D u p

l e x

P o l y u r e t

h a n e

P T F E

S t a i n l e s s s t e e

l

I n c o n e

l

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Cold water Hot water Demineralized water Sea water Drinking water

Heating - HVAC Acids (low concentration) Alcohol Oils Hydrocarbons

H e a

d l o s s

( m e

t e r o

f w a

t e r c o

l u m n

)

Figure 9: headloss towards flow

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80 3" 90 142 80 115 132 2100 4" 113 174 100 140 162 5.5125 5" 138 210 125 170 192 11150 6" 163 246 150 195 216 17200 8" 224 290 127 256 271 22250 10" 275 352 146 310 326 36300 12" 323 398 181 360 376 53350 14" 373 460 222 413 435 80400 16" 418 520 232 460 485 100450 18" 569 544 260 507 536 150500 20" 518 626 292 565 590 180600 24" 615 920 435 930 (2) 550700 28" 715 1120 500 1130 (2) 875800 32" 820 1180 515 1190 (2) 1100900 36" 930 1480 710 1490 (2) 16001000 40" 1030 1500 730 1510 (2) 20501200 48" 1230 1890 900 1900 (2) 34001400 56" 1430 2265 1120 2275 (2) 54001600 64" 1660 2520 1352 2540 (2) 81001800 72" 1860 2850 1440 2890 (2) 11850

Tyco reserves the right to change the contents without notice page 5

Check valves CLASARParts list and dimensions

Valve dimensions (mm)

DN Size A B C D E Weight

(mm) (inch) (Kg)

Notes

(1) The choice of the axial disc material depends on the applicationparameters, please contact factory.

(2) External diameter and drilling in accordance with the flangestandards.

(3) Dimensions in mm, weights in kg are given as guide

Flow

C l o s e

d

O p e n

Flow

C l o s e

d

O p e n

Flow

C l o s e

d

O p e n

Parts list

Item Quantity Designation Type Available materials Other materials

1a/1b 1 Body/Upstream body Ductile iron EN GJS 400-15 (JS1030) ASTM A536 Gr.60.40.18Stainless steel EN GX5CrNiMo-19-11-2 (1.4408) ASTM A351 CF8MDuctile NiResist alloy EN GJSA-XNiCr20-2 (JS3011) ASTM A439 D2Aluminium bronze EN CuAl10Fe5Ni5-C (CC333G) ASTM B148 Gr.958Duplex EN GX2CrNiMoN22-5-3 (1.4470) ASTM A890 Gr.4A

2a/2b 1 Backing plate/Downstream body Ductile iron EN GJS 400-15 (JS1030) ASTM A536 Gr.60.40.18Stainless steel EN GX5CrNiMo-19-11-2 (1.4408) ASTM A351 CF8MDuctile NiResist alloy EN GJSA-XNiCr20-2 (JS3011) ASTM A439 D2Aluminium bronze EN CuAl10Fe5Ni5-C (CC333G) ASTM B148 Gr.958Duplex EN GX2CrNiMoN22-5-3 (1.4470) ASTM A890 Gr.4A

3 1 Axial disc (1) PolyurethanePTFE

4 1 Spring Stainless steelInconel

5 1 O-ring NitrileEPDM

6 1 Tagplate Stainless steel

F l a n g e

d b o d y

W a f e r

b o d y

Figure 10

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80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 1000 1200 1400 1600 1800

3" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" 24" 28" 32" 36" 40" 48" 56" 64" 72"50 50 50 50 50 50 50 50 50 50 50 25 25 25 20 20 16 16 16 16

725 725 725 725 725 725 725 725 725 725 725 362 362 362 290 290 240 240 240 240

Tyco reserves the right to change the contents without notice page 6

Check valves CLASARMounting

Maximum working pressure

DN (mm)

Size (inch)MWP (bar)

MWP (psi)** at ambient temperature

Pipe flange

Figure 13: On request(DN600 to DN1800):Flanged mounting (flat face type)

Pipe flange Pipe flange

Pipe flange Pipe flange

Pipe flange

Example of a test on DN700 (28) carried out on every single valve of our production

Figure 12:DN600 to DN1800 (24 to 72):Flanged mounting (raised face type)

Figure 11: DN80 to DN500 (3 to 20):Wafer mounting

Mounting between flanges

DN (mm) 80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 1000 1200 1400 1600 1800

Size (inch) 3" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" 24" 28" 32" 36" 40" 48" 56" 64" 72"EN 1092-1, PN 6DIN 2501, PN 10BS 4504, PN 16ISO 2084 PN 25ISO 7005 PN 40EN 1759 Class 150

Class 300ANSI B 16.5 Class 150 See ANSI B16.47 A

Class 300ANSI B16.47 A Class 150 See ANSI B 16.5MSS SP 44 Class 150AWWA C207 Tables 2-3-4-5

Notes: : Possible for all versions

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Check valves CLASARMounting instruction

Tyco reserves the right to change the contents without notice page 7

Storage

This equipment in storage should be adequately protected against weather influence, salt sea-airdust and moisture.Room temperature should not be below -10C (+50F)No special precautions are required for storage longer than 6 months.

Mounting instructions

As for most valves and fittings, sliding flanges or similar on the pipework are recommended toprovide the clearances needed to insert and remove the valve and to prevent unacceptablestressing due to inevitable misalignment.At least one of the pipes connected to the valve must be firmly bolted to withstand the thrustduring valve closure.

Instructions before start up: Before mounting, carefully check the valve for cleanliness. Remove possible pollutions and

particles from the pipework and flush the system thoroughly with water or compressed air asappropriate.

Important! Particular care should be taken to remove pieces of welding rod chips liable to damagethe axial disc and sealing surfaces. Never weld the flanges to the pipe when the CLASAR is in position because this might damage

the axial disc. Provide a trash rack or strainer that will prevent particles from interfering the valves functionality. Check that the flow takes place in the direction shown by the arrow on the valve CLASAR wafer type valves must be perfectly aligned with the pipe centerline. Use spacer tubes

mounted on tie-rods if necessary.

Installation recommendation

Figure 14

Pump

CLASAR

Sapag butterfly valvecentric design

Figure 15

CLASARFigure 16

CLASAR

CLASAR

Sapag butterfly valve centric design

General

CLASAR check valves can be mounted in any position (horizontal, vertical and diagonal direction)

CLASAR is supplied without flange gaskets and bolts

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Ordering code

A code with the following basic information is marked on the tagplate:5 characters defining type and materialsFor the order, completing the below data with the following information: the nominal diameter (DN)

the flange connection and, if applicable, the valve options

Body and backing plate201 Ductile iron202 Ductile NiResist alloy203 Stainless steel204 Aluminium bronze205 Duplex

Axial disc (1)1 Polyurethane3 PTFE

Spring (1)1 Standard stainless steel3 Inconel

DN (mm)DN80 (3) - DN1800 (72)

Flanges: type(For class flanges, precise the standard)See page 6

PSWorking pressure (CWP)

Valve optionsFF Flat face

Approvals and certificates:P Potable water approved

X ATEX approved

Notes:(1) The choice of the material depends on the

application parameters, please contactfactory.

Examples

1. CLASAR with body and counter flange in ductile iron, axial disc in polyurethane, spring in stainless steel, DN200 for mounting betweenflanges defined by EN1092 in PN16, with a working pressure of 10 bar

CLASAR 20111-200 PN16 PS10: 2 0 1 1 1 - 200 PN16 PS10

Working pressure (10 bar max) Flanges (EN 1092 PN16)

Body and backing plate (Ductile iron) DN (200) Axial disc (Polyurethane) Spring (Stainless steel)

2. Same check valve but potable water approved (ACS) with a working pressure of 10 bar.

CLASAR 20111-200 PN16 PS10 P(ACS): 2 0 1 1 1 - 200 PN16 PS10 P(ACS)

Potable water approved (ACS) Body and backing plate (Ductile iron) Working pressure (10 bar max) Axial disc (Polyurethane) Flanges (EN 1092 PN16)

Spring (Stainless steel) DN (200)

Check valves CLASAROrdering code

Tyco reserves the right to change the contents without notice page 8

Some manufacturing steps within the manufacturing process of CLASAR

Example of CLASAR's wide diameter range